private void dgvInventory_CellClick(object sender, DataGridViewCellEventArgs e)
{
EditStockInId = Convert.ToInt32(dgvInventory.CurrentRow.Cells["StockInId"].Value);
StockIn inventory = StockInService.GetInventoryById(EditStockInId);
EditProductId = (int)inventory.ProductId;
txtProductId.Text = inventory.ProductId.ToString();
txtBatch.Text = inventory.Batch;
txtCount.Text = inventory.Count.ToString();
txtSubtotal.Text = inventory.Subtotal.ToString();
UserService userService = new UserService();
txtUser.Text = userService.GetUserById((int)inventory.UserId).Name;
dtpInStockTime.Value = inventory.InStockTime;
btnAdd.Enabled = false;
btnUpdate.Enabled = true;
}